Question

Chem 2 question
For which of the following reactions is the equilibrium constant called a solubility product?
A. CaC2O4(s) + 2H+(aq)<>Ca2+(aq)+H2C2O4(aq)
B. La(OH)3(s)<>La3+(aq)+3OH-(aq)
C. Ag+(aq)+Cl-(aq)<>AgCl(s)
D. Cu(OH)2(s)+4NH3<>Cu(NH3)4 2+(aq)+2 OH-(aq)
E. Zn(OH)2(s)+2 OH-<> Zn(OH)4 2-(aq)

I think I have to do this by knowing the Ksp but that is where I'm stuck

Answer 1

a solubility product is the equilibrium constant of a dissolution with dissociation equilibrium. This is characteristic of salts. which of these equilibriums has molecules dissociated into ions?

Answer 2

Is it B?

Answer 3

I think it is B also. You start out with a compound and it ends up being two different ions.

Answer 4

Ya thats what I was thinking. I was just confused if I needed to use the Ksp or not

Answer 5

I do not think so, but it would be nice to get another opinion

Answer 6

ya I will check with some other people. but the first reply on here says that as well so it's possible

Answer 7

OK. i will check for another comment by you after you check.

Answer 8

does B involve a salt?

Answer 9

A is Calcium oxalate
B is Lanthanum (III) hydroxide
C is Silver chloride <-- this is a salt
D is Copper (II) hydroxide
E is Zinc hydroxide

Dissolution and dissosiation
AgCl(s) <=> Ag+(aq) + Cl-(aq)